docs: def _get_settings_class():
      """
      Get the AUTH_ADFS setting from the Django settings.
      """
      if not hasattr(django_settings, "AUTH_ADFS"):
          msg = "The configuration directive 'AUTH_ADFS' was not found in your Django settings"
          raise ImproperlyConfigured(msg)
      cls = django_settings.AUTH_ADFS.get('SETTINGS_CLASS', DEFAULT_SETTINGS_CLASS)
      return import_string(cls)